4. Subjects must have bilateral polypoid disease demonstrated either by CT or endoscopy with evidence of nasal polyps or polypoid mucosa on examination in at least two of the following areas: right maxillary sinus, left maxillary sinus, right anterior ethmoid sinus, left anterior ethmoid sinus plus a minimal polyp/polypoid score of 4 on the baseline rhinoscopic examination. (Nasal polyps are defined as discreet polyps visible in the middle meatus area.)